What type of array and how do you want to store it? If you have an integer array you could get away with storing the values in CSV without a text qualifier:

Public Class frmArray
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim lst As New List(Of Integer)
lst.Add(1)
lst.Add(2)
lst.Add(3)
Dim intArray As Integer() = lst.ToArray()
'Now we have test data set up
Dim lstString As New List(Of String)
For Each i As Integer In lst
lstString.Add(Convert.ToString(i))
Next
System.IO.File.WriteAllText("C:\file.csv", String.Join(",", lstString.ToArray()))
End Sub
End Class